nation. north korea's young leader carried out his threat today, cancelling the 60-year truce that ended the korean war. a step experts say could lead to a dangerous miscalculation. north korean soldiers being whipped into a near frenzy against the u.s. they shout "destroy american imperialist aggressor, the deadly enemy of north korean people, destroy, destroy, destroy." firing them up, their untested young leader kim jong un. inspecting fortifications across the waters from the demilitar o demilitarized zone with south korea. he told the troops to be ready to annihilate the enemy at any moment. so far a war of words as kim jong un tries to prove his strength and test south korea's newly elected female president, park geun-hye, who held her first cabinet meeting today. as troops held annual exercises, experts worry the threats could get out of control.